# 2007 June 8 # # The author disclaims copyright to this source code. In place of # a legal notice, here is a blessing: # # May you do good and not evil. # May you find forgiveness for yourself and forgive others. # May you share freely, never taking more than you give. # #*********************************************************************** # This file implements regression tests for SQLite library. The # focus of this file is testing NULL comparisons in the WHERE clause. # See ticket #2404. # # $Id: where5.test,v 1.2 2007/06/08 08:43:10 drh Exp $ set testdir [file dirname $argv0] source $testdir/tester.tcl # Build some test data # do_test where5-1.0 { execsql { CREATE TABLE t1(x TEXT); CREATE TABLE t2(x INTEGER); CREATE TABLE t3(x INTEGER PRIMARY KEY); INSERT INTO t1 VALUES(-1); INSERT INTO t1 VALUES(0); INSERT INTO t1 VALUES(1); INSERT INTO t2 SELECT * FROM t1; INSERT INTO t3 SELECT * FROM t2; } execsql { SELECT * FROM t1 WHERE x<0 } } {-1} do_test where5-1.1 { execsql { SELECT * FROM t1 WHERE x<=0 } } {-1 0} do_test where5-1.2 { execsql { SELECT * FROM t1 WHERE x=0 } } {0} do_test where5-1.3 { execsql { SELECT * FROM t1 WHERE x>=0 } } {0 1} do_test where5-1.4 { execsql { SELECT * FROM t1 WHERE x>0 } } {1} do_test where5-1.5 { execsql { SELECT * FROM t1 WHERE x<>0 } } {-1 1} do_test where5-1.6 { execsql { SELECT * FROM t1 WHERE x=NULL } } {} do_test where5-1.10 { execsql { SELECT * FROM t1 WHERE x>NULL } } {} do_test where5-1.11 { execsql { SELECT * FROM t1 WHERE x!=NULL } } {} do_test where5-1.12 { execsql { SELECT * FROM t1 WHERE x IS NULL } } {} do_test where5-1.13 { execsql { SELECT * FROM t1 WHERE x IS NOT NULL } } {-1 0 1} do_test where5-2.0 { execsql { SELECT * FROM t2 WHERE x<0 } } {-1} do_test where5-2.1 { execsql { SELECT * FROM t2 WHERE x<=0 } } {-1 0} do_test where5-2.2 { execsql { SELECT * FROM t2 WHERE x=0 } } {0} do_test where5-2.3 { execsql { SELECT * FROM t2 WHERE x>=0 } } {0 1} do_test where5-2.4 { execsql { SELECT * FROM t2 WHERE x>0 } } {1} do_test where5-2.5 { execsql { SELECT * FROM t2 WHERE x<>0 } } {-1 1} do_test where5-2.6 { execsql { SELECT * FROM t2 WHERE x=NULL } } {} do_test where5-2.10 { execsql { SELECT * FROM t2 WHERE x>NULL } } {} do_test where5-2.11 { execsql { SELECT * FROM t2 WHERE x!=NULL } } {} do_test where5-2.12 { execsql { SELECT * FROM t2 WHERE x IS NULL } } {} do_test where5-2.13 { execsql { SELECT * FROM t2 WHERE x IS NOT NULL } } {-1 0 1} do_test where5-3.0 { execsql { SELECT * FROM t3 WHERE x<0 } } {-1} do_test where5-3.1 { execsql { SELECT * FROM t3 WHERE x<=0 } } {-1 0} do_test where5-3.2 { execsql { SELECT * FROM t3 WHERE x=0 } } {0} do_test where5-3.3 { execsql { SELECT * FROM t3 WHERE x>=0 } } {0 1} do_test where5-3.4 { execsql { SELECT * FROM t3 WHERE x>0 } } {1} do_test where5-3.5 { execsql { SELECT * FROM t3 WHERE x<>0 } } {-1 1} do_test where5-3.6 { execsql { SELECT * FROM t3 WHERE x=NULL } } {} do_test where5-3.10 { execsql { SELECT * FROM t3 WHERE x>NULL } } {} do_test where5-3.11 { execsql { SELECT * FROM t3 WHERE x!=NULL } } {} do_test where5-3.12 { execsql { SELECT * FROM t3 WHERE x IS NULL } } {} do_test where5-3.13 { execsql { SELECT * FROM t3 WHERE x IS NOT NULL } } {-1 0 1} do_test where5-4.0 { execsql { SELECT xNULL FROM t3 } } {{} {} {}} do_test where5-4.4 { execsql { SELECT x>=NULL FROM t3 } } {{} {} {}} do_test where5-4.5 { execsql { SELECT x!=NULL FROM t3 } } {{} {} {}} do_test where5-4.6 { execsql { SELECT x IS NULL FROM t3 } } {0 0 0} do_test where5-4.7 { execsql { SELECT x IS NOT NULL FROM t3 } } {1 1 1} finish_test